If the diameter is 18 ft then the radius is 9 ft = 3 yards.
Then the area is pi*r2 = 28.27 sq yards.
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18ft is equal to 6 yards so a square of 6yds x 6yds would have an area of 36 square yards.
If it's a circle, around 1017.88 square feet.
18ft= how many yards
The area of a circle with a diameter of 24 yards is: 452.4 square yards OR 4,071.6 square feet.
18 feet = 6 yards